you will find some that are well used and find some that are as new. My thoughts are that most of the sks carbines that came into the US in quantity may have been rebuilt. but that doesnt mean some were not new from the arsenal storage facitlities. the chinese do not mark rebuilts like some other countries do so you have to look very carefully to see if something has been rebuilt or refinished. i have a as new sino and a battle worn sino in my collection.